| 摘要 |
A tool 112 for retrieving a whipstock 104 includes a portion which self aligns the tool as it travels along the whipstock 104 in response to axial force. The self aligning portion can be an angled tip (307, fig 4), a full diameter portion (404, fig 4) and curved lines (408, fig 4) extending from the full diameter portion (404, fig 4) to the angled tip (307, fig 4). The tool 112 and whipstock 104 may include cooperating engagement profiles 118, 202. |
